<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>内部样式</title>
    <link rel="stylesheet" href="public.css">
    
</head>
<body>
    <p>内部样式</p>
    <a href="a.html">产品</a>
    <p>哈哈</p>
</body>
</html>